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UC Davis #11: count prove Σi^2 = n(n+1)(2n+1)/6 where i=1 to n
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Lamar U 2nd way: evaluate trig integral ∫x sin(x^2) [cos^4(x^2) + 8 cos^2(x^2)-10] dx
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Lamar U: #11 trig integral ∫csc^6(x/4) cot^4(x/4) dx
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